This class relates to the distribution of fluid to brake motors,
i.e., the utilization of fluid-pressure in the operation of brakes.

SECTION II - LINES WITH OTHER CLASSES AND WITHIN THIS CLASS

Systems for the distribution of pressure fluid to a plurality
of motors other than brake motors are, for the most part in Class
60, Power Plants, subclasses 6, 97, 420, 484, and their respective
indented subclasses, and Class 91, Motors: Expansible Chamber Type,
subclasses 165+ and 508+.

Power Plants,
subclasses 325+ for a pressure fluid source supply motive fluid
to an output motor of general utility, particularly subclasses 533+ a
master-slave system. See the Search Class reference to Class 303
in subclass 533 of Class 60 for the line between these classes as
to pulsators.

Fluid Handling, appropriate subclasses for fluid handling systems of more
general application, and in particular see
subclasses 203+ for devices for collecting and discharging condensate
from a low point in the system, subclass 381 for shields to protect
exposed valves, subclasses 545+ for devices for separating
foreign matter from the brake fluid, and subclass 598 for distribution
systems including a flow passage between a master cylinder and a
brake cylinder and means to control the fluid flow, e.g., "hill
holders", and see the Note to the definition of this subclass
(598).

This subclass is indented under subclass 6.01. Subject matter including means for regulating the fluid
flow to the motors such that one to the motors may be operated (a)
independent of another motor and (b) in unison with the other motor,
when desired.

(1)Note. This subclass may also include the sequential control
of fluid pressure operated motors.

This subclass is indented under subclass 6.01. Subject matter including means for varying the fluid flow
to one motor relative to the flow to another motor, e.g., for varying
the braking action of a form brake motor with respect to rear brake
motor of a vehicle.

This subclass is indented under subclass 9.62. Subject matter wherein the fluid is distributed to the fluid
pressure operated motors of a motorized land vehicle having a single
from wheel and at least one rear wheel, e.g., a motorized velocipede.

This subclass is indented under subclass 9.62. Subject matter wherein the means for varying the fluid flow
includes means responsive to a gravity induced load on a supporting
machine, e.g., a land vehicle.

This subclass is indented under subclass 9.62. Subject matter wherein the means for varying the fluid flow
is substantially affected by the amount of fluid pressure present
in a fluid line connected to a fluid pressure operated, forward motor
used for stopping a vehicle.

(1)Note. While many front/rear apportioning valves
in tandem brake systems have a front pressure line connected thereto, significance
with relation to affected apportioning valve operation must be claimed
for a patent to be considered as an original classification in this
subclass.

Upon the initiation of distribution at the first unit, a
circuit is closed to continue the action electrically on other units.
A current-generator may be operated upon the initial action to
furnish current for the subsequent actions on other units.

This subclass is indented under the class definition. Subject matter wherein int distribution of fluid to the
brake motors of a machine, e.g., a vehicle, is regulated by means
which responds to the weight of a gravity loading on the machine.

This subclass is indented under subclass 22.1. Subject matter wherein the regulating means responds in
one manner of the machine does not have a gravity loading on it
and in a different manner in the presence of a such a loading.

This subclass is indented under subclass 22.2. Subject matter wherein the regulating means is capable of
being changed so that it may be used for another type of application
e.g., used on a passenger a high speed express, or a freight type
vehicle.

This subclass is indented under subclass 22.1. Subject matter wherein the regulating means is affected
by fluid pressure generated by the action of hydraulic or pneumatic
suspension means used to help support the gravity loading.

This subclass is indented under subclass 22.1. Subject matter wherein the regulating means is intended
for use on a rail guided and supported conveyance.

(1)Note. While the term "railway" or similar
terminology may not always be claimed, a patent is considered to
be proper hereunder as an original classification of its disclosure
limits it to use in a railway vehicle.

The piston of the motor is held inactive between two equal
pressures, the action of the motor occurring upon the expansion
of compressed fluid on one side when the fluid on the other side
is permitted to escape.

A valve which in one position connects the control-pipe
to the auxiliary reservoir and the motor to atmosphere and which
upon reduction of pressure in the control-pipe connects the auxiliary
reservoir to the motor.

(1)Note. The devices included in this subclass are what are
known as "plain triple valves". Equalizing-valves
having functions in addition to those just enumerated will be found
under various headings implying the nature of these functions.

Devices designed to produce a simultaneous application of
fluid to the motors of a series, the method being to secure a momentary exhaust
of fluid from the control-pipe to the atmosphere through each equalizing-valve
as the control-pipe pressure is lowered for an emergency operation.

(1)Note. Consult this class, subclass 82 for other devices for
momentary exhaust of control-pipe fluid upon sudden lowering of
pressure.

Devices designed to produce a simultaneous application of
fluid to the motors of a series, the method being to secure a momentary exhaust
of fluid from the control-pipe through the equalizing-valve as the
control-pipe pressure is lowered for a service operation.

Devices for moving the equalizing-valve main piston by means
other than the usual unbalancing of pressures in control-pipe and
local supply. The purpose is usually to move the piston to release
position when stuck.

Motorman"s valves in which a diaphragm is balanced
by opposing pressures, the valve containing means for modifying
the relation of the opposing pressures to permit the control-pipe pressure
to reduce to any desired point.

This subclass is indented under subclass 84.1. Subject matter wherein a specific controlling mechanism,
i.e., a valve is used to cut off and separate a portion of a fluid
distribution system form another portion.

This subclass is indented under subclass 121. Apparatus wherein the braking action is regulated at least
in part by means responsive to a force or combination of forces
producing or tending to produce a twisting or rotating motion on
a braked rotating member.

This subclass is indented under subclass 121. Structure wherein there is provided a fluid pressure regulator
which includes at least in part a fluid passage opening or closing
structure responsive to a speed deceleration (e.g., actuating a
brake pedal).

This subclass is indented under subclass 113.2. Structure wherein the acceleration or drive slip prevention
also includes a power assist device associated with a master cylinder
for controlling the release and reapplication of brake pressure
through an interaction with the power assist device.

This subclass is indented under subclass 113.1. Structure wherein a movement in a fluid pressure regulator
element (e.g., a piston, brake pedal) is measured and a corresponding
signal is utilized in an anti-lock control.

This subclass is indented under subclass 113.1. Structure wherein the fluid pressure regulator cooperates
with a power assist device associated with a master cylinder for
controlling the release and reapplication of brake pressure through
an interaction with the power assist device.

Power Plants,
subclass 545for a pulsator having electrically or magnetically
operated structure, subclass 561 for a pulsator having a pressure
balancing free piston or a diaphragm between parallel pulsators,
subclass 581 for plural structurally related master pistons, cylinders
or pulsator circuits, and subclass 582 for a pulsator having a safety
standby structure becoming operative due to the malfunction of a
power booster system.

This subclass is indented under subclass 113.1. Structure wherein the fluid pressure regulator cooperates
with a power assist device of the compressed air type that is associated
with a master cylinder for controlling the release and reapplication
of brake pressure through an interaction with the power assist device.

This subclass is indented under subclass 113.1. Structure wherein the fluid pressure regulator includes
a variable volume reactive device (e.g., piston and cylinder, bellows
type) having a motive fluid valve to regulate the pressure of the
braking fluid.

This subclass is indented under subclass 113.1. Apparatus wherein the fluid pressure regulator comprises
an additional fluid circuit including fluid pressurizing means (e.g.,
pump) and at least one fluid passage opening and closing structure
which responds to an electromagnetic force for modifying the pressure
of the braking fluid.

This subclass is indented under subclass 116.1. Apparatus in which the fluid pressurizing means fluid source
is independent of the fluid source for a mutually reactive expansible chambers
device that operates the brake system.

This subclass is indented under subclass 113.1. Apparatus wherein the fluid pressure regulator includes
valve means for controlling braking pressure to admit the necessary
amount of air pressure to the brakes of a vehicle or a railroad vehicle.

This subclass is indented under subclass 113.1. Apparatus wherein the fluid pressure regulator includes
at least one fluid passage opening and closing structure which responds
to an electromagnetic force.

This subclass is indented under subclass 119.1. Apparatus in which the specific structure of the electromagnetically
operated fluid pressure regulator, e.g., number of paths or passageways,
coil, electrical contacts, armature effects the system.

This subclass is indented under the class definition. Subject matter wherein the braking fluid and therefore the
braking action is regulated by velocity.

(1)Note. A speed condition can be, for example, a velocity signal
from a single wheel or plural wheels, or a velocity signal from
a vehicle body.

(2)Note. Included in this subclass are the following: a positive
rate-of-change of velocity (acceleration) from a wheel or plural
wheels; a negative rate-of-change of velocity (deceleration) from
a wheel or plural wheels; an acceleration from a vehicle body; or
a deceleration from a vehicle body.

Measuring and Testing,
subclasses 488+ for measuring and testing speed or acceleration,
subclass 495 for speed or acceleration diverse condition indicating,
and subclass 509, for speed or acceleration with response to a nonspeed
condition.

Interrelated Power Delivery Controls, Including
Engine Control,
subclass 40for using an engine transmission control with brake
control to slow a vehicle and subclasses 182+ for an engine brake
control to slow a vehicle.

Data Processing: Vehicles, Navigation, and Relative
Location,
subclass 70for indication or control of braking, acceleration,
or deceleration; subclasses 71+ and 82+ for processing
or calculating a parameter used to determine antiskid, antilock,
or antispin.

This subclass is indented under subclass 121. Speed control provided with means for detecting faulty operation
of a speed control regulator and means for overriding a speed condition regulator.

(1)Note. This subclass includes systems which cycle the speed
responsive control means in response to a simulated speed condition
to thereby check for the proper operation of the speed responsive
means and also includes means for monitoring various components
of a speed responsive control means to detect any failure thereof.

Communications: Electrical,
subclasses 453+ for communication automatically responsive to a
brake condition, and subclass 515 for testing of an automatically
responsive system by simulation of condition.

This subclass is indented under subclass 122. Speed control with failure response in which the faulty
operation and the state of the wheel rotation retarding or halting
device is detected and signaled to the vehicle operator.

This subclass is indented under subclass 122.04. Speed control with electric failure response in which the
faulty operation of an energized element; e.g., rate sensor, is
detected and indicated to a vehicle operator.

This subclass is indented under subclass 122. Speed control with failure response in which the faulty
operation occurs during an interval when braking torque is maximum
or ground engaging member rate is high.

This subclass is indented under subclass 122. Speed control with failure response in which the faulty
operation is detected during an interval where monitoring circuits
are no longer consistent; e.g., the wheel speed is sampled and compared
to a previous speed (i.e., no deceleration) or a predetermined limit.

This subclass is indented under subclass 122. Speed control with failure response in which, prior to the
braking action, a predetermined condition is used to check or analyze
a skid control system (sensors, regulator, electrical components,
etc.) to ensure proper operation.

This subclass is indented under subclass 122.08. Pressure failure in which the faulty operation of a backup
system, used in case of a failure or malfunction of a main hydraulic
pressure system, is sensed.

This subclass is indented under subclass 128. Train speed control in which the velocity of the conveyance
is regulated by a system using a pressurized liquid medium or by
a system responsive to a change of motion.

This subclass is indented under subclass 129. Train speed control with governor in which the velocity
is contrasting an actual parameter; e.g., speed, acceleration, with
a previously defined parameter.

This subclass is indented under subclass 121. Speed control in which a rate of vehicle travel, decreasing
rate per time, or wheel slip is brought to the attention of a vehicle
operator via a lamp, recorder, etc.

This subclass is indented under subclass 139. Speed and traction control in which the braking action is
controlled by an additional parameter different from the usual condition
of acceleration or pressure.

This subclass is indented under subclass 121. Speed control with failure response in which the braking
action is controlled by detection of a low to high road-tire resistance
based on wheel deceleration versus a reference deceleration.

This subclass is indented under subclass 121. Speed control in which an electric to mechanical energy
converter is conditioned during the braking action to operate as
a generator thereby permitting recapture of the kinetic energy during
the braking action.

This subclass is indented under subclass 121. Speed control in which a hydraulic motor normally driving
the vehicle is conditioned during the braking action to operate
as a generator thereby permitting recapture of the vehicle"s kinetic
energy during the braking action.

This subclass is indented under subclass 121. Speed control in which the braking action is determined
from more than one input; e.g., large spin-up rate, a small wheel
speed versus car deviation, wheel speed, vehicle speed, slip, deceleration,
coefficient of friction, having more than one limit condition, reference,
or value.

This subclass is indented under subclass 121. Speed control in which the braking action is (a) controlled
by a response of an operator; i.e., force applied to the brake pedal
or (b) is equalized throughout a system; e.g., front or rear brakes
adjusted to supply more braking depending on sensed parameters such
as wheel speed.

This subclass is indented under subclass 121. Speed control in which conditions; e.g., wheel velocity,
vehicle acceleration, coefficient of friction, monitored during
the braking action are evaluated to determine either control of
the braking fluid force.

This subclass is indented under subclass 121. Speed control in which the rate of a road engaging member
of a typical vehicle is found by changes in, for example, a compressed
fluid system, rate per time change, vehicle rate, displacement,
coefficient of friction, to decide braking action.

This subclass is indented under subclass 121. Speed control in which the braking action is dependent upon
stepping the amperage or electric potential to rotate a brake motor
to assure a smooth increase in force.

This subclass is indented under subclass 121. Speed control in which the braking action is subsequently
determined from a dimensionless number using the equation, vehicle
speed minus wheel speed then divided by vehicle speed (at the time
of brake impartation).

This subclass is indented under subclass 121. Speed control in which the braking action is affected by
comparing a wheel spin or slippage threshold with detection of an
actual wheel spin and altering the threshold for the spin detected.

This subclass is indented under subclass 121. Speed control in which both the detection of rate of a road
engaging member of a typical vehicle and detection of a compressed
fluid decides the braking action force.

This subclass is indented under subclass 121. Speed control in which detection of a rotating road engaging
member by a magnetic or optical pick-up element, or a tachometer-type device,
makes an electrical wave that is processed to determine braking
action.

This subclass is indented under subclass 171. Speed control in which the braking action is affected by
a road engaging member rate exceeding a conveyance rate found by
inputs from the road engaging member rate.

This subclass is indented under subclass 171. Speed control in which the braking action is altered by
a fastest rate of a road engaging member exceeding a reference value
of a conveyance rate found by a rate of road engaging members slower
than the fastest rate.

This subclass is indented under subclass 121. Speed control in which the braking action is controlled
by comparing a value of the road engaging member velocity held in
a memory to the instantaneous velocity.

This subclass is indented under subclass 121. Speed control in which the braking action is regulated by
a condition of apparent or impending loss of traction of one wheel;
e.g., front wheel, by rotating at a higher circumferential speed
than another wheel on the same axle.

This subclass is indented under subclass 177. Sensing acceleration in which a road engaging member rate
per time circuit produces a reference signal which is a function
of a difference or inaccuracy between a road engaging member rate
and a rate which is a function of the signal.

This subclass is indented under subclass 177. Sensing acceleration wherein the braking fluid is regulated
to allow for a brake release in response to negative rate of change
or velocity followed by a brake reapplication in accordance with
a positive rate of change of velocity.

This subclass is indented under subclass 191. Odd condition in which the rate (or an obstruction) is found
by a detector that operates in the (a) sonic or supersonic range,
or (b) ultrahigh frequency or microwave part of the radio spectrum
range.

This subclass is indented under subclass 191. Odd condition in which high or low amplitude pulses, produced
by a wheel going over an obstruction or falling into a hole, are
detected during braking action.

This subclass is indented under the class definition. Structure wherein the anti-lock brake system includes the
particular elements of a preset fluid regulating device which restricts
flow in one direction.

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